Construction of aeroplanes



R. VERDUZlG.

1 CONSTRUCTION OF AEROPLANES.

APPLICATION FILED 00?. I6, 1920.

1 ,4;30, Patented Sept. 26, 1922.

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fiwmfo/w 2740/ 0 067ML5 Patented ept. 26, i922.

are tar RODOIJEO VERDUZIO, OF HOME, ITALY.

CONSTRUCTION OF AEROELANES.

Application filed October 16, 1920. Serial No. 417,436.

To all whom it may '720677L.

Be it known that I, Rononro Vnnnuzro, lieutenant colonel in the Royal Italian Army, a subject of the King of Italy, re-

siding at Rome, in Kingdom of Italy, have invented certain new and useful Improvements in the Construction of rieroplanes (for which I have filed applications in Italy, dated July 19, 1919; France, dated July 29, 1920), of which the following is a specification.

The invention refers to improvements in the construction of aeroplanes with the object of reducing the head resistance and to simplify the construction at the same time increasing the strength of the apparatus, and improving its behaviour during the flight.

The results above mentioned are obtained by building-up the whole frame-work of the wings of stiff compression members constituting an indeformable system.

In the annexed drawing the threeiigures illustrate diagrammatically three embodiments of the present invention in front elevation.

The stiffness of the wings in the types of aeroplanes actually in use is obtained, as known, by means of connecting parts including compression members (struts) and tension members (diagonals), the former built in wood or metal and the latter consisting of ropes or, better, steel cables. According to the present invention instead, the whole frame is built up with stiff compression members so arranged that they constitute an indeformable system.

In Fig. l is shown a first type of such structure built with metal pipes mconnecting the wings a with the fuselage F so as to constitute an indeformable triangular system.

It will be understood that other arrangements may be adopted securing the same results, one of which is, for instance, shown in Fig. 2 and which does not prevent the use of wires and cables in combination with the rigid members. And an alternative is shown also in Fig. 3 in which -tare the tension members such as wires and cables, and mthe compression memhere.

The characteristic feature of the several arrangements consists in that the two central compression members m of the wing bracing are directly fastened to the fuselage? Wires and cables can always be conveniently used to connect the members of the structure in planes parallel to the direction of the wind.

The advantages of the aforesaid type of structure are two fold viz: of aerodynamic character, consisting in the fact that it confers to the apparatus a much higher penetration than that found in apparatus of ordinary construction; and of a structural character, in that the displacement of connections under the working stresses is lessened and the whole structure keeps a shape which is more similar to the initial, thus largely improving the conditions of resistance of the longitudinal members of the wings.

In order to realize all of the above eX- plained advantages, the rigid structure of the wing bracing is preferably applied in combination with a fuselage of the type showing the front part having a rectangular or trapezoidal section, and the rear part having a triangular section which gradually decreases toward the tail end, terminating in a simple vertical or. horizontal rib, the front and rear sections being conveniently connected by a series of tapering trapezoidally crosssectioned intermediate portions.

The external covering of the wings can be a developable surface or not, a ruled surface or not, to suit circumstances.

Claims- 1. In an aeroplane, in combination with the fuselage and a wing brace structure including an upper and a lower wing plane, a

'pair of upwardly diverging struts on each side of the fuselage the lower ends of which are attached to said fuselage at a point intermediate said two planes and whose upper ends are attached to said upper plane.

2. In an aeroplane, in combination with the fuselage, a wing brace structure co1nprising an upper and a lower wing plane In testimony whereof I aflix my signature 10 in spaced relation, and a plurality of comin presence of two witnesses, at Home, in pression members on each side of the fusethe Kingdom of Italy this 17th day of Seplage interconnecting said planes, the innertember 1920.

most pair of compression members on each side of the fuselage extending convergently RODOLFO VERDUZIO. from the upper plane downward to a point Witnesses: of attachment on the fuselage intermediate GETTION GABORITTAZ,

said two planes. VVILHELM TAHANID. 

